Fluid charging head



Feb. 10, 1942. w. B. THREM 2,272,445

FLUID CHARGING HEAD Filed March 2'7, 1939 2 Sheets-Sheet l 3mm ?;T;- I LLliHium :ELThTETH V 33% Q Patented Feb. 10, 1942 iTED stars 1 Claim.

This invention relates to pressure charging and release of gases.

This invention has utility when incorporated in control heads or valve devices for pressure gas servicing.

Referring to the drawings:

Fig. l is a side elevation, with parts broken away, of an embodiment of the head in assembled position with a dispensing or service container, say for whipped cream;

Fig. 2 is a plan view of the head of Fig. 1;

Fig. 3 is a side elevation of a pressure charged assembly and controls for the head, parts being broken away;

Fig. 4 is a section on showing valve details of the charging for the head;

Fig. 5 is a section on the line V--V, Fig. 4,

the line IVIV, Fig. 2, branch showing the seating means for the check valve features at the perforable diaphragm check valve therefor;

Fig. 6 is a view on the line VI-VI, Fig. 4, showing the charging branch in elevation with the plug closure therefor in position'and with the pressure cylinder fitting removed;

Fig. 7 is a view on the line VII-VII, Fig. 4, looking at the plunger check valve as in position;

Fig. 8 is a view on the line VIII-VIII, Fig. 6, showing the plunger check valve as the unit for the charging branch;

Fig. 9 is a view similar to Fig. 8, showing the branch as having the perforable diaphragm check valve only therewith;

Fig. 10 is a view on the line XX, Fig. 9, looking toward the diaphragm or disk to be perforated; and v Fig. 11 is a view of a pressure fluid charger or cartridge for the container of Fig. 1 in lieu of the pressure fluid charging tank as shown in Fig. 3.

A container is shown having external wall I (Fig. 1), and internal cup 2 as a double-walled structure having internal cap 3, outer protecting shell cap 4, provided with central tube 5 from intake fitting 3 mounting head 1, herein shown as provided with spout B. The tube or duct 5 extends downwardly in the chamber or cup 2 to a lower terminal port. This spout 8 (Fig. 4) is in communication with chamber 9 and has internal threading ID to carry plunger ll provided with knurled head l2 having depending skirt l3 about the head I and therein a compressible gasket I4. This plunger H has compressible seat 15 to be shifted off of port l6 and thereby allow spill of pressure fluid from chamber H in the head I, thence by the port I6 into the chamber 9 for discharge by the port 8 ina controlled quantity as determined by rotation of the knurled head l2. The tube 5 provides a chamberconnection from the chamber IT to the cup or charge receiving major chamber 2. This knurled head I2 has pressure fit assembly with the plunger ll at roughened sections Hi. The

anchorage of this head 1 with-service container cap portion 4 is desirably through screw machine fitting 6 having rivet assembly l9 with flangeifl. There is an efficient set-up to-withstand the range of pressures up to several atmospheres in the instance that the charge be say nitrous oxid from pressure cylinder 2| (Fig. 3) having valve 22 with communication through duct 23 past fitting 24 to valve 25 in fitting 26 on which is mounted gage 21 showing supply pressure from the cylinder 2i. Also in communication with this valve fitting 26, at the delivery or discharge side therefrom, is gage 28. Thisgage 28 shows the deliveryp'ressure for the gas as passingby duct 29 to fitting 36 having gland 3| and operating or hand wheel 32. This fitting 3t] may be provided with port providing attaching means 33 (Fig. l) mounting point orterminus 34 of tubular member 35 of hypodermic needle type. This needle device for cooperating with the port means 33 is protected by sleeve portion 36 effective to telescope over branch 31 having thread connection 38 with the head I.

This branch 31 is tubular andis provided with internally threaded portion 39 in which may be located against shoulder or seat 40 for yieldable partition or perforable diaphragm 4|, as of rubber, back of removable externally threaded disk 42 having transverse slot 43 (Fig. 10). A screw driver may thus be effective to place or remove this holding washer or nut 42 and thereby, upon removal, permit replacement of the perforable or rubber diaphragm 4|. This diaphragm 4| is desirably of such elastic or compressible material as to be readily perforated by the needle 34 but upon removal of such needle is self-closed and is thus an automatic check valve independent of moving parts. Experience in practice has been that in this operation the diaphragm may be efficient for an extended number of even fifty or more perforations before tendency to leak.

However, occasion may be adopted to place in this branch 3? nut 14 having tubular extension 45 therefrom in which is loosely located stem 46 having head 41 carrying valve seat 48. The extension 45 therefore provides a guide for the plunger having the head 47, which guide is effective to direct and control the stem 46. This stem 46 may have, after insertion, its terminal portions 49 spread or flared to hold the stem of this plunger check valve assembled with the nut or fitting 44. Accordingly, as pressure builds up in central passage 58 of this branch 31 it will seat this plunger check valve automatically and thereby protect the charge in the container against leakage and likewise protect the perforable check valve section at the diaphragm 41.

With the heavy charging pressure from a charging cylinder 2| the hypodermic needle 34, 35, is an efficient device for quick functioning hereunder to build up a charge in the service container to a desired pressure as disclosed by the gage 28. Upon withdrawal of the needle there is self-sealing at the perforable diaphragm 4| In the event there is a supplemental plunger type of check valve, it is an additional safeguard against seepage. These are factors of importance in the event the charge of the container be a food substance, say of liquid or semi-liquid as cream, the service being of whipped cream portions. This charging gas may be nitrous oxid, carbon dioxid or air under pressure and there might be use of the gas without mixing with fluid. However it is desired, such has a range for serving beverages and foodstuffs as at soda fountains.

In some-instances, instead of having the containers brought to assembly with a large charging cylinder 2|, the pressure supply means may be service cartridges 5| for a pressure charge of the desired fluid or gas. Stem 52 therein may be manually operated as the threaded portion 53 of this cartridge 5| is assembled with the internall threaded portion 39 of the branch 37. In this position for the externally threaded portion 53, desirably it is sealed by gasket portion 56 (Figll) and as the plunger 52 is withdrawn, pressure fluid may enter to act to unseat the plunger check valve head 41 at seat 48, thus permitting charging flow to a desired extent into the chamber I! of the head I.

In other instances, instead of the dual check A valve of the perforable diaphragm and plunger type, and in lieu of the plunger type, there may be perforabl diaphragm alone. Such perforable diaphragm 4| may be assembled against shoulder 55 (Fig. 9). In carrying out the invention herein, there is simplicity in a compact control head readily operable say by thumb or finger action to permit the discharge by way of the spout 8. In such periods of none-use it may be appropriate to place knurled plug 56 (Figs. 6, 8) in closur position on the branch 37. Th control of this knurled head [2 is for desired service portions as of whipped cream. There is accordingly requirement to replenish this pressure charge in the container. To such end, the plug 56 may b removed. If the servicing be at the place of business in which the container is used, this servicing may be from cartridge 5|, allowed to expend charge entirely in the container or to be left in assembly therewith until the cartridge be exhausted. The cartridge flow is controlled through the plunger or valve 52. It is, of course, to be understood that this small dimension cartridg may not be effective to build up the charge in the service container to an extent which may be effective from pressure cylinder 2|. Accordingly, in lieu of these small, high pressure service charges by cartridges the entire service container may be subjected to the charge and, for rapidity in functioning with efiiciency in closing, the hypodermic needle type of device is an eiiicient assembly therefor.

What is claimed and it is desired to secure by United States Letters Patent is:

A fluid charger control head for a service container having a delivery spout, a control valve therefor, a chamber connection from said head, a charging branch adapted to respond to supplied pressure charge, said branch being connected to the head between the control valve and chamber connection, check valve means in said branch mountable as a unit and comprising a plunger, a guide for the plunger providing a seat and a disk carried by the plunger cooperating with said seat, a charging cartridge, a packing for sealing the cartridge with the branch, and a control for releasing pressure in the cartridge to operate said plunger and check valve means.

WM. B. THREM 

